using Nulls

@inline is_univtime(x::UniversalTime)   = true
@inline is_univtime(x::LocalTime)  = false
@inline is_localtime(x::UniversalTime)  = false
@inline is_localtime(x::LocalTime) = true

@inline is_univtime(x::Clock)  = null
@inline is_localtime(x::Clock) = null
